Query: network_security_group_by_resource_group

select
  resource_group || ' [' || sub.title || ']' as "Resource Group",
  count(n.*) as "Network Security Groups"
from
  azure_network_security_group as n,
  azure_subscription as sub
where
  n.subscription_id = sub.subscription_id
group by
  resource_group,
  sub.title
order by
  resource_group;